linux-kernel - Re: [PATCH] fs: move and constify sysctl_nr_open_min, sysctl_nr_open

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Message-ID: <261b7728-a9f3-4ceb-8325-b8ad1fae993c@p183>
Date:   Sat, 14 Oct 2023 12:22:56 +0300
From:   Alexey Dobriyan <adobriyan@...il.com>
To:     David Laight <David.Laight@...lab.com>
Cc:     "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Al Viro <viro@...iv.linux.org.uk>
Subject: Re: [PATCH] fs: move and constify sysctl_nr_open_min,
 sysctl_nr_open_max

On Thu, Oct 12, 2023 at 01:54:06PM +0000, David Laight wrote:
> From: Alexey Dobriyan
> > Sent: 11 October 2023 19:24

> > +/* our min() is unusable in constant expressions ;-/ */
> > +#define __const_min(x, y) ((x) < (y) ? (x) : (y))
> > +static const unsigned int sysctl_nr_open_max =
> > +	__const_min(INT_MAX, ~(size_t)0/sizeof(void *)) & -BITS_PER_LONG;
> 
> I think you'll find that min() is fine.

Mainline min() still can't do

	static const x = min(1, 2);